The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.9 via the set_customer_object due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate arbitrary customer records and disclose personally identifiable information - including first name, last name, email address, and phone number - by iterating the customer[id] parameter. This issue is exploitable only when the site is configured with customer authentication disabled (guest checkout enabled).
CVE-2026-18441
MEDIUMPre-NVD 4.34.3—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 4.3 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 4.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.3
- EG Score
- 4.3(high)
- EG Risk
- 19(Track)EG Risk 19/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity43% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 16%
- KEV
- Not listed
Published
September 17, 2026
Last Modified
September 19, 2026
References (5)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.9/latepoint.php#L1006
- security@wordfencehttps://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.9/lib/controllers/steps_controller.php#L341
- security@wordfencehttps://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.9/lib/helpers/steps_helper.php#L1184
- security@wordfencehttps://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.9/lib/models/model.php#L574
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/d80ed885-43f8-43a4-bc61-e9ef92e3207e?source=cve
Vendor Advisories for CVE-2026-18441(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 12× in last 7d / 12× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-20 17:31 UTCEG score recompute
- 2026-09-20 17:31 UTCGHSA enrichment
- 2026-09-19 15:30 UTCEG score recompute
- 2026-09-19 15:30 UTCGHSA enrichment
- 2026-09-19 14:31 UTCEG score recompute
- 2026-09-19 14:30 UTCGHSA enrichment
- 2026-09-18 19:27 UTCEPSS rescore
- 2026-09-18 13:40 UTCEG score recompute
- 2026-09-18 13:40 UTCGHSA enrichment
- 2026-09-18 00:28 UTCEG score recompute
- 2026-09-17 23:34 UTCEG score recompute
- 2026-09-17 23:34 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-639
Frequently asked(5)
What is CVE-2026-18441?
CVE-2026-18441 is a medium vulnerability published on September 17, 2026. The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.9 via the setcustomerobject due to missing validation on a user controlled key. This makes it possible…
When was CVE-2026-18441 disclosed?
CVE-2026-18441 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18441 actively exploited?
CVE-2026-18441 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 84.2% of all scored CVEs.
What is the CVSS score of CVE-2026-18441?
CVE-2026-18441 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-18441?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18441, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-18441
Is Your Infrastructure Affected by CVE-2026-18441?
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